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A long slender bar is made from an unknown material. The length of the bar is 0.752 m, its cross-sectional area is 1.48 × 10-4 m2, and its mass is 2.49 kg. A sound wave travels from one end of the bar to the other end in 2.30 × 10-4 s. Find the Young's modulus of the unknown material.
In a game of pool, a cue ball with an initial velocity of 1.25 m/s directed to the right (along the +x-axis) collides with the five ball, Find the cue ball's final velocity
A hypodermic syringe contains a medicine with the density of water. The barrel of the syringe has a cross-sectional area A = 2.60 10-5 m2, and the needle has a cross-sectional area a = 1.00 10-8 m2.
A ball is thrown horizontally from a height of 19.8 m and hits the ground with a speed that is three times its initial speed
A conical pendulum is formed by attaching a 50 g mass to a 2 m string. The mass swings around a horizontal circle of radius 1 m. What is the acceleration of the mass
Suppose |L| = 10 and r = 2i + 3j + 4k and |p| = 10. What is the angle between the radius and momentum vectors
What is the longest wavelength of light that may be absorbed by a hydrogen atom that starts in the second excited state
A swimmer heads directly across a river, swimming at 1.60 m/s relative to the water. She arrives at a point 58.0 m downstream from the point directly across river, 63 m wide. What is the speed of the river current.
wo resistors R1 and R2 are connected in parallel, and this combination is connected in series with a third resistor R3. what is the equivalent resistance of this combination
A solid disk is rotating about an axis with uniform angular velocity. another disk, with the same moment of intertia about the rotation axis, how is the new angular velocity related to the old one
A car of mass 930 kg is traveling over the top of a hill, If the hill has a radius of curvature of 38 m and the car is traveling at 13 m/s, what is the normal force between the hill and the car at the top of the hill
On an icy (nearly frictionless) street a 600 kg car traveling straight east at 5 m/s collides with a 1000 kg car traveling straight north at 3 m/s. what is the direction of motion of the second car
A bullet of mass mb = 16 g is fired with a speed of 260 m/s at a target that is a sheet of metal (mass mt = 410 g). what is the angular velocity of the target plus bullet just after the bullet hits
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